static gs_sigaction_func gs_signal_install_handler(void)
{
    struct sigaction act, oact;
    sigemptyset(&act.sa_mask);
    act.sa_sigaction = gs_res_signal_handler;
    act.sa_flags = 0;
    act.sa_flags |= SA_SIGINFO;
    act.sa_flags |= SA_RESTART;

    sigaction(RES_SIGNAL, &act, &oact);
    return oact.sa_sigaction;
}